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`TinyBoxedStr` is a small-string optimized replacement for `Box<str>` styled after <https://cedardb.com/blog/german_strings/>. A nearly identical type is used in helix-editor/spellbook for space savings. This type is specialized for its use-case: * strings are immutable after creation * strings are very very small (less than 256 bytes long) Because of these attributes we can use nearly the full size of the type for the inline representation and also keep a small total size. Many other small string crates in the wild are 3 `usize`s long (same as a regular `String`) to support mutability. This type is more like a `Box<str>` (2 `usize`s long). Mostly I like this small string type though because it's very straightforward to implement. Other than a few functions that reach into `std::alloc` or `std::ptr`, the code is short and boring. |
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